d496dad33c
- limit missing headers results set to 100 so that extraction doesn't excessively block delegation - wrap checked headers functions in repository struct - move storage repository to factory, to correspond with event repository path - remove unused files - reformat sql - remove line breaks in imports
60 lines
1.9 KiB
Go
60 lines
1.9 KiB
Go
// VulcanizeDB
|
|
// Copyright © 2019 Vulcanize
|
|
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package fetcher
|
|
|
|
import (
|
|
"github.com/ethereum/go-ethereum"
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
|
|
"github.com/vulcanize/vulcanizedb/pkg/core"
|
|
)
|
|
|
|
type ILogFetcher interface {
|
|
FetchLogs(contractAddresses []common.Address, topics []common.Hash, missingHeader core.Header) ([]types.Log, error)
|
|
// TODO Extend FetchLogs for doing several blocks at a time
|
|
}
|
|
|
|
type LogFetcher struct {
|
|
blockChain core.BlockChain
|
|
}
|
|
|
|
func NewLogFetcher(blockchain core.BlockChain) *LogFetcher {
|
|
return &LogFetcher{
|
|
blockChain: blockchain,
|
|
}
|
|
}
|
|
|
|
// Checks all topic0s, on all addresses, fetching matching logs for the given header
|
|
func (logFetcher LogFetcher) FetchLogs(addresses []common.Address, topic0s []common.Hash, header core.Header) ([]types.Log, error) {
|
|
blockHash := common.HexToHash(header.Hash)
|
|
query := ethereum.FilterQuery{
|
|
BlockHash: &blockHash,
|
|
Addresses: addresses,
|
|
// Search for _any_ of the topics in topic0 position; see docs on `FilterQuery`
|
|
Topics: [][]common.Hash{topic0s},
|
|
}
|
|
|
|
logs, err := logFetcher.blockChain.GetEthLogsWithCustomQuery(query)
|
|
if err != nil {
|
|
// TODO review aggregate fetching error handling
|
|
return []types.Log{}, err
|
|
}
|
|
|
|
return logs, nil
|
|
}
|